1.有大量动词可跟that引起的从句作宾语：
They proved that the world was round.
他们证明地球是圆的。
I hope that I have said nothing wrong.
希望我没说错什么话。
She never doubted that she was right.
她从不怀疑她是对的。
在某些动词后连词that常常省略：
I know you can do it.
我知道你能做这事。
He said there's been an accident.
他说出事了。
I guess we'll leave now.
我想我们得走了。
She felt she had little energy left.
她感到一点力气都没有了。
I heard you were here.
我听说你在这儿。
2.在某些动词后，作宾语的从句中要用动词原形(美国用法)或用should+动词原形(英国用法)：
She insisted that I (should) be there.
她坚持要我出席。
The situation requires that we (should) be there.
形势要求我们呆在那里。
They urged that he see her.
他们敦促他去见她。
3.还有不少动词后跟连接副(代)词等引起的宾语从句：
Do you see now why I did it?
你现在明白我为什么这样做了?
I don't care what they say.
我不在乎他们怎么说。
I'll see whether I can find time to do it.
我要看我是否有时间做这件事。
Try and find out if she is interested in going.
设法了解她是否有兴趣去。
